isdn_v110: mark expected switch fall-through

In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warnings:

drivers/isdn/i4l/isdn_v110.c: In function ‘EncodeMatrix’:
drivers/isdn/i4l/isdn_v110.c:353:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
    if (line >= mlen) {
       ^
drivers/isdn/i4l/isdn_v110.c:358:3: note: here
   case 128:
   ^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

Notice that, in this particular case, the code comment is modified
in accordance with what GCC is expecting to find.

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/isdn/i4l/isdn_v110.c b/drivers/isdn/i4l/isdn_v110.c
index 2a5f6668756cd6ea79cc8e98e18e7b606fecd2e7..d11fe76f138f4b4a9abda30c7ac966be487c4de5 100644 (file)
--- a/drivers/isdn/i4l/isdn_v110.c
+++ b/drivers/isdn/i4l/isdn_v110.c
@@ -354,7 +354,7 @@ EncodeMatrix(unsigned char *buf, int len, unsigned char *m, int mlen)
                                printk(KERN_WARNING "isdn_v110 (EncodeMatrix): buffer full!\n");
                                return line;
                        }
-                       /* else: fall through */
+                       /* fall through */
                case 128:
                        m[line] = 128;  /* leftmost -> set byte to 1000000 */
                        mbit = 64;      /* current bit in the matrix line */